646477053 has 8 divisors (see below), whose sum is σ = 882993216. Its totient is φ = 420472800.

The previous prime is 646477049. The next prime is 646477087. The reversal of 646477053 is 350774646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646477053 - 2² = 646477049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646476996 and 646477014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646477253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2627833 + ... + 2628078.

It is an arithmetic number, because the mean of its divisors is an integer number (110374152).

Almost surely, 2^646477053 is an apocalyptic number.

It is an amenable number.

646477053 is a deficient number, since it is larger than the sum of its proper divisors (236516163).

646477053 is a wasteful number, since it uses less digits than its factorization.

646477053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255955.

The product of its (nonzero) digits is 423360, while the sum is 42.

The square root of 646477053 is about 25425.9130219546. The cubic root of 646477053 is about 864.6712876657.

The spelling of 646477053 in words is "six hundred forty-six million, four hundred seventy-seven thousand, fifty-three".